New geometry calorimeter and Performance test

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New geometry calorimeterand Performance test

• VLCW06 Sim/Recon section
• July 21 2006
• H.Ono, T.Yoshioka
• and GLDCAL, Acfa-Sim-J members

(C) Rei Hori
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GLD Full Simulator Study

• Cheated/Real PFA study was tested by old tower
  geometry last year.
• Calorimeter baseline configuration was fixed as
  dodecagonal structure in DOD.
• Realistic calorimeter geometry has implemented
  into GLD Full Simulator for realistic PFA study.
• PFA Particle Flow Algorithm based on the finely
  segmented calorimeter technique.

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Latest Design of GLD detector
Muon detector and Calorimeter was fixed as
dodecagonal shape
Proposed in GLDDOD
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Previous geometry in Full Simulator

• Muon detector was already installed as 12gon.
• Calorimeter was still old configuration.

Old tower structure
Z cut view
r-f cut view
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Calorimeter Geometry Update
Geometry implementation was finished
HCAL
Tower structure
Dodecagonal structure
ECAL
(12-gon)
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Tower Calorimeter Geometry
HD CAL 130Layers 6.1 ?0

• Parameter List
• Endcap Inner R
• 40cm
• Barrel Tower Front R
• 210cm
• Endcap Tower Front R
• 270cm

EM HD
Scinti. 2mm
12cm
Divide 12?12
Lead 8mm
EM CAL 38Layers 27X0
Scinti. 1mm
12cm
Lead 4mm
Divide 3?3
Tower
Calorimeter
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New calorimeter geometry
Active Layer
Absorber
Endcap
y
z
Barrel
x
Cell size 1x1, 2x2cm
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Calorimeter Layer new configuration
(Previous configuration Lead 4mm Scintillator
1mm)
1mm Readout space
5mm Scintillator
1mm Readout space
2mm Scintillator
20mm Lead
3mm Tungsten
1mm Readout space
1mm Readout space
2mm Scintillator
5mm Scintillator
3mm Tungsten
20mm Lead
EM 33 Layers
HD 46 Layers
EM/HD same segmentation Cell size 1cmx1cm,
2cmx2cm
1cmx1cm Effective size of Strip CAL 2cmx2cm
Backup plan (Tile CAL)
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Detail of Calorimeter size
Readout Line 10cm
349.4cm
BarrelHD
229.8cm
BarrelEM
210cm
270cm
EndcapHD
EndcapEM
Barrel.InnerRadius210cm
Endcap.InnerRadius40cm
Barrel.HalfZ280cm
419.4cm
299.8cm
280cm
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Basic Performance Test
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Linearity
Measured Energy (GeV)
Gamma for EM E1.004Ein
K0L for HD E1.049Ein
Beam Energy (GeV)
Beam Energy (GeV)
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Energy Resolution
?/E
?/E
Beam Gamma
Bean K0L
EM ???/E 15.37 / Sqrt(E)
HD ???/E 47.3 / Sqrt(E)
Beam Energy (GeV)
Beam Energy (GeV)
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Theta dependence
Energy vs cos?
CAL inner Material vs cos?
gamma 5GeV
Gap between barrel and endcap exist as a readout
space (10cm)
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PFA study
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Previous Geometry Event Display
Previous geometry EM 4cmx4cm HD 12cmx12cm
Z?qq (2jets)
sqrt(s)91.2 GeV
red pion gray kaon0L yellow
photon cyan neutron purple electron blue
muon
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Typical Event Display
Current 1cmx1cm
Z?qq (2jets)
sqrt(s)91.2 GeV
red pion gray kaon0L yellow
photon cyan neutron purple electron blue
muon
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Cheated Method Analysis(Perfect clustering)
Cheated PFA is a cheating version of PFA. Use
virtual position information (TPC outer) It can
be achieved infinite segmentation.
M1/M2 2jets mass
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Can be separated even though same cell hits.



Cluster 1
Cluster 2
Z--gtuds (91.2 GeV)
Virtual layer for tagging Mother particle ID
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?? reconstruction test
?0 10 GeV event 2 photon, barrel only event was
selected
Entries
?0 Mass (GeV)
?0 Mass (GeV)
Cheated method with infinite segmentation
Cheated method with actural(1cmx1cm) segmentation
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Tower Geometry Performance
M1/M2 2jets mass
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Realistic PFA
Calorimeter only
Tohoku T.Fujikawa
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New Calorimeter PFA Performance
PFA scheme, parameters use as same as previous
one. Preliminary result!
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Optimization of PFA
M1/M2 2jets mass

• We need parameter optimization for New geometry
  calorimeter.
• Optimize Calibration constant, theta dependence,
  energy dependence etc.
• Optimize several parameters for better PID purity
  and efficiency.
• Likelihood method for optimization.
• Yoshioka-sans talk.

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60
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Remaining Tasks
M1/M2 2jets mass

• Cell to Strip combine method for strip structure
  study should be prepared in analysis part (Next
  step).
• Strip calorimeter performance study
• Install strip clustering method into current
  realistic clustering scheme.
• Hayashi-san (Kobe) study this part.

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Appendix
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Particle Flow Algorithm (PFA)
Contribution of Jet Energy Charged 65, g
25, Neutral Hadron 9

• Jet energy measured by
• Charged Tracker (dP/P 10-410-5 P)
• Photon EM calorimeter
• Neutral hadron EM/HAD calorimeter

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Analysis flow of GLD-PFA(Realistic Clustering)
M1/M2 2jets mass

• MIP finding (Find interaction layer)
• Muon finding (Not yet implemented)
• Small clustering and Gamma finding
• -- Separate Gammas and Charged tracks.
• Electron finding (Not yet implemented)
• Track Cluster Matching
• -- Separate Charged particle and Neutral Hadrons.
• Neutral Hadron Clustering
• Satellite Hits Finding

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60
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PID in Detectors
ECAL
HCAL
Tracker
VTX
Muon
electron
photon
charged hadron
muon
neutral hadron
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Z-gtuds 350GeV Event Display
Z?uds
sqrt(s) 350GeV
red pion gray kaon0L yellow
photon cyan neutron purple electron blue
muon
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Material in Full Simulator
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New GLD geometry design
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Latest Geometry in Full Simulator
12-gon structure
CAL EM/HD, Barrel/Endcap Structure